Precipitation of Fe-rich intermetallic phases in liquid Al-13.58Si-11.59Fe-1.19Mn alloy

To contribute to the understanding of the Al–Fe–Mn–Si system, an exhaustive analysis of the intermetallic phases formed during thermal analysis experiments and specific isothermal treatments was carried out. In this work, three different phases were identified: the extensively reported β and α phase...

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Bibliographic Details
Published in:Intermetallics 2010-08, Vol.18 (8), p.1617-1622
Main Authors: Orozco-Gonzalez, P, Castro-Roman, M, Martinez, Arturo I, Herrera-Trejo, M, Lopez, A A, Quispe-Marcatoma, J
Format: Article
Language:English
Subjects:
A. Aluminides
Alloy systems
Aluminum
Aluminum base alloys
B. Crystallography
C. Crystal growth
Diffraction
F. Diffraction
Intermetallic phases
Liquids
Phase identification
Phases
Thermal analysis
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Summary:To contribute to the understanding of the Al–Fe–Mn–Si system, an exhaustive analysis of the intermetallic phases formed during thermal analysis experiments and specific isothermal treatments was carried out. In this work, three different phases were identified: the extensively reported β and α phases and the τ h phase. The τ h phase has been reported for the ternary Al–Fe–Si system, but not for the quaternary Al–Fe–Mn–Si system. Nonetheless, the present results suggest that the formation of the τ h phase upon solidification of the alloy can be stabilized in the quaternary Al–Fe–Mn–Si system, with respect to the monoclinic θ-Al 3Fe phase in the ternary Al–Fe–Si system, due to the Mn addition. The τ h phase was unambiguously identified with the help of complementary techniques such as SEM/EDS, X-ray diffraction and Mössbauer spectroscopy.
ISSN:0966-9795
1879-0216
DOI:10.1016/j.intermet.2010.04.014